User guide

OmniSwitch 7700/7800/8800 Switch Management Guide April 2006 page 4-1
4 Managing CMM
Directory Content
The CMM, Chassis Management Module, is the management unit for the OmniSwitch 7700/7800/8800
system. Each OmniSwitch 7700/7800/8800 chassis can run with two CMMs to provide redundancy; one
CMM is designated as the primary CMM, and one is designated as the secondary CMM. One or the other
runs the switch, but never at the same time.
The directory structure of the CMM is designed to prevent corrupting or losing switch files. It also allows
you to retrieve a previous version of the switch software.
In This Chapter
This chapter describes the basic functions of CMM directory management and how to implement them
using the Command Line Interface (CLI). CLI commands are used in the configuration examples; for
more details about the syntax of commands, see the OmniSwitch CLI Reference Guide.
For specifics on the CMM boards, see the OmniSwitch 7700/7800 Hardware Users Guide and OmniSwitch
8800 Hardware Users Guide.
This chapter contains the following information:
• The interaction between the running configuration, the working directory, and the certified directory is
described in “CMM Files” on page 4-3.
• A description of how to restore older versions of files and prevent switch downtime is described in
“Software Rollback Feature” on page 4-4.
• The CLI commands available for use and the correct way to implement them are listed in “Managing
the Directory Structure of the CMM (Non-Redundant)” on page 4-9.
• The CLI commands and issues involved in managing the directory structure of a chassis with redun-
dant CMMs are described in “Managing Redundant CMMs” on page 4-19.